WO2023067740A1 - 銅微粒子分散体 - Google Patents
銅微粒子分散体 Download PDFInfo
- Publication number
- WO2023067740A1 WO2023067740A1 PCT/JP2021/038814 JP2021038814W WO2023067740A1 WO 2023067740 A1 WO2023067740 A1 WO 2023067740A1 JP 2021038814 W JP2021038814 W JP 2021038814W WO 2023067740 A1 WO2023067740 A1 WO 2023067740A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- copper
- less
- fine particle
- particle dispersion
- Prior art date
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 302
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 296
- 239000010949 copper Substances 0.000 title claims abstract description 296
- 239000006185 dispersion Substances 0.000 title claims abstract description 192
- 239000011859 microparticle Substances 0.000 title claims abstract description 40
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims abstract description 86
- 239000002105 nanoparticle Substances 0.000 claims abstract description 81
- 239000002612 dispersion medium Substances 0.000 claims abstract description 71
- -1 ethyleneoxy groups Chemical group 0.000 claims abstract description 67
- LVTJOONKWUXEFR-FZRMHRINSA-N protoneodioscin Natural products O(C[C@@H](CC[C@]1(O)[C@H](C)[C@@H]2[C@]3(C)[C@H]([C@H]4[C@@H]([C@]5(C)C(=CC4)C[C@@H](O[C@@H]4[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@@H](O)[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@H](CO)O4)CC5)CC3)C[C@@H]2O1)C)[C@H]1[C@H](O)[C@H](O)[C@H](O)[C@@H](CO)O1 LVTJOONKWUXEFR-FZRMHRINSA-N 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 57
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 29
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 235000011187 glycerol Nutrition 0.000 claims abstract description 15
- 150000002314 glycerols Chemical class 0.000 claims abstract description 14
- 125000001183 hydrocarbyl group Chemical group 0.000 claims abstract description 13
- 239000010419 fine particle Substances 0.000 claims description 120
- 239000000758 substrate Substances 0.000 claims description 63
- 239000002245 particle Substances 0.000 claims description 44
- 238000009835 boiling Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 22
- 235000019441 ethanol Nutrition 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 14
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 13
- 235000007586 terpenes Nutrition 0.000 claims description 13
- 239000012298 atmosphere Substances 0.000 claims description 12
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 238000005304 joining Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 239000010931 gold Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052763 palladium Inorganic materials 0.000 claims description 5
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 abstract description 5
- 238000003860 storage Methods 0.000 description 72
- 150000001875 compounds Chemical class 0.000 description 34
- WWZKQHOCKIZLMA-UHFFFAOYSA-N Caprylic acid Natural products CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 22
- 230000015572 biosynthetic process Effects 0.000 description 19
- 238000003786 synthesis reaction Methods 0.000 description 19
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 18
- 239000000843 powder Substances 0.000 description 17
- 239000003153 chemical reaction reagent Substances 0.000 description 16
- 239000000126 substance Substances 0.000 description 15
- GONOPSZTUGRENK-UHFFFAOYSA-N benzyl(trichloro)silane Chemical compound Cl[Si](Cl)(Cl)CC1=CC=CC=C1 GONOPSZTUGRENK-UHFFFAOYSA-N 0.000 description 14
- FUZZWVXGSFPDMH-UHFFFAOYSA-N n-hexanoic acid Natural products CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
- 239000003638 chemical reducing agent Substances 0.000 description 10
- 229920001223 polyethylene glycol Polymers 0.000 description 10
- 239000005639 Lauric acid Substances 0.000 description 9
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 8
- 239000002202 Polyethylene glycol Substances 0.000 description 7
- 239000000654 additive Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 7
- WUOACPNHFRMFPN-SECBINFHSA-N (S)-(-)-alpha-terpineol Chemical compound CC1=CC[C@@H](C(C)(C)O)CC1 WUOACPNHFRMFPN-SECBINFHSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- OVKDFILSBMEKLT-UHFFFAOYSA-N alpha-Terpineol Natural products CC(=C)C1(O)CCC(C)=CC1 OVKDFILSBMEKLT-UHFFFAOYSA-N 0.000 description 6
- 229940088601 alpha-terpineol Drugs 0.000 description 6
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical compound CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000502 dialysis Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 229920006395 saturated elastomer Polymers 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000005635 Caprylic acid (CAS 124-07-2) Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 235000021355 Stearic acid Nutrition 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 4
- 229960002446 octanoic acid Drugs 0.000 description 4
- 229920001515 polyalkylene glycol Polymers 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 238000006722 reduction reaction Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000008117 stearic acid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000005632 Capric acid (CAS 334-48-5) Substances 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 3
- NSGDYZCDUPSTQT-UHFFFAOYSA-N N-[5-bromo-1-[(4-fluorophenyl)methyl]-4-methyl-2-oxopyridin-3-yl]cycloheptanecarboxamide Chemical compound Cc1c(Br)cn(Cc2ccc(F)cc2)c(=O)c1NC(=O)C1CCCCCC1 NSGDYZCDUPSTQT-UHFFFAOYSA-N 0.000 description 3
- 235000010724 Wisteria floribunda Nutrition 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000004108 freeze drying Methods 0.000 description 3
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 239000002923 metal particle Substances 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- GLZPCOQZEFWAFX-UHFFFAOYSA-N Geraniol Chemical compound CC(C)=CCCC(C)=CCO GLZPCOQZEFWAFX-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- UYXTWWCETRIEDR-UHFFFAOYSA-N Tributyrin Chemical compound CCCC(=O)OCC(OC(=O)CCC)COC(=O)CCC UYXTWWCETRIEDR-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- QMVPMAAFGQKVCJ-UHFFFAOYSA-N citronellol Chemical compound OCCC(C)CCC=C(C)C QMVPMAAFGQKVCJ-UHFFFAOYSA-N 0.000 description 2
- 229960004643 cupric oxide Drugs 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- CDOSHBSSFJOMGT-UHFFFAOYSA-N linalool Chemical compound CC(C)=CCCC(C)(O)C=C CDOSHBSSFJOMGT-UHFFFAOYSA-N 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- 239000001490 (3R)-3,7-dimethylocta-1,6-dien-3-ol Substances 0.000 description 1
- QMVPMAAFGQKVCJ-SNVBAGLBSA-N (R)-(+)-citronellol Natural products OCC[C@H](C)CCC=C(C)C QMVPMAAFGQKVCJ-SNVBAGLBSA-N 0.000 description 1
- CDOSHBSSFJOMGT-JTQLQIEISA-N (R)-linalool Natural products CC(C)=CCC[C@@](C)(O)C=C CDOSHBSSFJOMGT-JTQLQIEISA-N 0.000 description 1
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 1
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 description 1
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 description 1
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 description 1
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 description 1
- CRWNQZTZTZWPOF-UHFFFAOYSA-N 2-methyl-4-phenylpyridine Chemical compound C1=NC(C)=CC(C=2C=CC=CC=2)=C1 CRWNQZTZTZWPOF-UHFFFAOYSA-N 0.000 description 1
- NCZPCONIKBICGS-UHFFFAOYSA-N 3-(2-ethylhexoxy)propane-1,2-diol Chemical compound CCCCC(CC)COCC(O)CO NCZPCONIKBICGS-UHFFFAOYSA-N 0.000 description 1
- FUSNOPLQVRUIIM-UHFFFAOYSA-N 4-amino-2-(4,4-dimethyl-2-oxoimidazolidin-1-yl)-n-[3-(trifluoromethyl)phenyl]pyrimidine-5-carboxamide Chemical compound O=C1NC(C)(C)CN1C(N=C1N)=NC=C1C(=O)NC1=CC=CC(C(F)(F)F)=C1 FUSNOPLQVRUIIM-UHFFFAOYSA-N 0.000 description 1
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 239000005792 Geraniol Substances 0.000 description 1
- GLZPCOQZEFWAFX-YFHOEESVSA-N Geraniol Natural products CC(C)=CCC\C(C)=C/CO GLZPCOQZEFWAFX-YFHOEESVSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 102220475869 Keratin, type I cytoskeletal 10_R12A_mutation Human genes 0.000 description 1
- 235000021360 Myristic acid Nutrition 0.000 description 1
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- QVHMSMOUDQXMRS-UHFFFAOYSA-N PPG n4 Chemical compound CC(O)COC(C)COC(C)COC(C)CO QVHMSMOUDQXMRS-UHFFFAOYSA-N 0.000 description 1
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 1
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical class CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000007933 aliphatic carboxylic acids Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- BIVUUOPIAYRCAP-UHFFFAOYSA-N aminoazanium;chloride Chemical compound Cl.NN BIVUUOPIAYRCAP-UHFFFAOYSA-N 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- JGQFVRIQXUFPAH-UHFFFAOYSA-N beta-citronellol Natural products OCCC(C)CCCC(C)=C JGQFVRIQXUFPAH-UHFFFAOYSA-N 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003985 ceramic capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000000484 citronellol Nutrition 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 description 1
- HFDWIMBEIXDNQS-UHFFFAOYSA-L copper;diformate Chemical compound [Cu+2].[O-]C=O.[O-]C=O HFDWIMBEIXDNQS-UHFFFAOYSA-L 0.000 description 1
- QYCVHILLJSYYBD-UHFFFAOYSA-L copper;oxalate Chemical compound [Cu+2].[O-]C(=O)C([O-])=O QYCVHILLJSYYBD-UHFFFAOYSA-L 0.000 description 1
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- 229940105990 diglycerin Drugs 0.000 description 1
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229940113087 geraniol Drugs 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000012493 hydrazine sulfate Substances 0.000 description 1
- 229910000377 hydrazine sulfate Inorganic materials 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229930007744 linalool Natural products 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 229930003658 monoterpene Natural products 0.000 description 1
- 235000002577 monoterpenes Nutrition 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- JLFNLZLINWHATN-UHFFFAOYSA-N pentaethylene glycol Chemical compound OCCOCCOCCOCCOCCO JLFNLZLINWHATN-UHFFFAOYSA-N 0.000 description 1
- ACVYVLVWPXVTIT-UHFFFAOYSA-N phosphinic acid Chemical compound O[PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007764 slot die coating Methods 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 description 1
- NCPXQVVMIXIKTN-UHFFFAOYSA-N trisodium;phosphite Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])[O-] NCPXQVVMIXIKTN-UHFFFAOYSA-N 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
Definitions
- the present invention relates to a copper fine particle dispersion and a method for producing a joined body using the copper fine particle dispersion.
- copper Since copper has excellent electrical and thermal conductivity, it is widely used as, for example, a conductor wiring material, a heat transfer material, a heat exchange material, a heat dissipation material, and the like. Since copper has excellent thermal conductivity, it is sometimes used as an alternative material to solder for joining objects to be joined.
- Patent Document 1 discloses a copper paste containing copper powder and a liquid medium for the purpose of providing a copper paste having high bonding strength with an object to be bonded, wherein the liquid medium contains polyethylene glycol, and the copper particles constituting the copper powder have an average primary particle size of 0.03 ⁇ m or more and 1.0 ⁇ m or less, and a fatty acid having 6 or more and 18 or less carbon atoms is applied to the surface. and the crystallite size of the (111) plane is 50 nm or less, and the mass ratio of the copper powder in the copper paste is 50% or more and 99% or less.
- Patent Document 2 discloses a first method containing copper for the purpose of providing a method for producing copper nanoparticles that can easily obtain monodisperse copper nanoparticles. a preparation step of dissolving a metal salt, a complexing agent, a dispersant, and a second metal salt containing a metal with a lower ionization tendency than copper in water to prepare a reaction solution; , and a deposition step of adding a reducing agent and depositing copper nanoparticles.
- the present invention contains copper nanoparticles A, a carboxylic acid B having 6 to 14 carbon atoms, a compound C represented by the following formula (1), and a dispersion medium D
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives,
- the content of the carboxylic acid B is 0.1% by mass or more
- the content of the compound C is 0.05% by mass or more
- It relates to a fine copper particle dispersion, wherein the total content of the carboxylic acid B and the compound C is 8% by mass or less.
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms, and n is an average number of added moles of ethyleneoxy groups, and is a number of 0.5 or more and 20 or less.
- Copper fine particle dispersions which have been proposed as a bonding material to replace solder, have higher heat resistance than solder, but still have room for improvement in terms of bonding strength with objects to be bonded.
- the bonding strength of the resulting joined body may be defective depending on the storage period of the copper fine particle dispersion. It is difficult to use such copper fine particle dispersions with poor storage stability for mounting power devices.
- the copper paste described in Patent Document 1 in which copper fine particles to which hydrophobic lauric acid has been applied is dispersed in hydrophilic polyethylene glycol, produces a bonded body after storage for one month. Defective bonding strength was observed. This is considered to be caused by poor dispersion of the copper paste.
- the present invention relates to a fine copper particle dispersion capable of obtaining a bonded body having improved bonding strength even after being stored for a certain period of time, and to a method for producing a bonded body using the copper fine particle dispersion.
- the present inventors have discovered copper nanoparticles A, a carboxylic acid B having 6 to 14 carbon atoms, a compound C represented by RO—(CH 2 CH 2 O) n —CH 2 —COOH, and (poly)alkylene glycol.
- a (poly) alkylene glycol derivative a terpene alcohol
- the dispersion stability of the copper fine particle dispersion, the storage stability, and the sinterability at low temperatures are improved, and the The present inventors have found that it is possible to provide a copper fine particle dispersion capable of obtaining a joined body having improved joining strength even after storage, and a method for producing a joined body using the copper fine particle dispersion.
- [1] Contains copper nanoparticles A, a carboxylic acid B having 6 to 14 carbon atoms, a compound C represented by the following formula (1), and a dispersion medium D,
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives,
- the content of the carboxylic acid B is 0.1% by mass or more
- the content of the compound C is 0.05% by mass or more
- a copper fine particle dispersion wherein the total content of the carboxylic acid B and the compound C is 8% by mass or less.
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is an average number of added moles of ethyleneoxy groups, and is a number of 0.5 or more and 20 or less.
- a method for producing a joined body comprising the step of interposing the fine copper particle dispersion according to [1] above between a plurality of metal members and heating the same.
- the present invention it is possible to provide a copper fine particle dispersion capable of obtaining a joined body with improved joining strength even after being stored for a certain period of time, and a method for producing a joined body using the copper fine particle dispersion.
- the copper fine particle dispersion of the present invention contains copper nanoparticles A, a carboxylic acid B having 6 to 14 carbon atoms, a compound C represented by the following formula (1), and a dispersion medium D, wherein the dispersion medium D is (poly) At least one selected from the group consisting of alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives, the content of carboxylic acid B is 0.1% by mass or more, and the content of compound C is 0.05% by mass or more, and the total content of carboxylic acid B and compound C is 8% by mass or less.
- the dispersion medium D is (poly) At least one selected from the group consisting of alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives, the content of carboxylic acid B is 0.1% by mass or more, and the content of compound C is
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is the average number of added moles of ethyleneoxy groups and is a number of 0.5 or more and 20 or less.
- “sinterability at low temperature” means that metal sintering occurs in a low-temperature nitrogen atmosphere, and is also referred to as “low-temperature sinterability”.
- the bondability of a plurality of metal members under a low temperature nitrogen atmosphere is also referred to as "low temperature bondability”. Further, for example, the low-temperature bondability after storing the copper fine particle dispersion for one month under conditions of 25° C.
- low temperature means a temperature lower than the general sintering temperature (about 250 to 300° C.) when using a silver nanoparticle dispersion. It refers to a temperature range of about 230° C., and it is preferable to improve sinterability and bondability at a lower temperature.
- the copper nanoparticles A contained in the copper fine particle dispersion according to the present invention are (poly)alkylene glycol, (poly)alkylene It is believed that they are dispersed in a dispersion medium D containing at least one selected from the group consisting of glycol derivatives, terpene alcohols, glycerin and glycerin derivatives.
- Carboxylic acid B having 6 to 14 carbon atoms has good coordination with copper nanoparticles A, but has strong hydrophobicity, so copper nanoparticles A with carboxylic acid B coordinated to hydrophilic dispersion medium D. is considered to be inferior to the dispersibility of
- the compound C having a hydrocarbon group having 6 to 14 carbon atoms, a carboxy group and an ethyleneoxy group contains a hydrophilic group and a hydrophobic group in a well-balanced manner, the hydrophobic carboxylic acid B and the hydrophilic dispersion It is considered that the compatibility with the medium D is good.
- a combination of a carboxylic acid B having 6 to 14 carbon atoms and a compound C represented by the above formula (1) is used to coordinate the carboxylic acid B. It is considered that the dispersibility of the copper nanoparticles A thus formed in the dispersion medium D is effectively improved, and the dispersion stability and storage stability of the copper fine particle dispersion are improved.
- the carboxylic acid B having 6 to 14 carbon atoms is a low-molecular-weight ligand and is easily volatilized, and the ethyleneoxy group of the compound C is easily decomposed by the copper nanoparticles A at a low temperature.
- the carboxylic acid B and the compound C do not interfere with bonding. Therefore, since the copper nanoparticles A are close to each other even in a low-temperature nitrogen atmosphere, it is considered that low-temperature sinterability and low-temperature bondability are improved.
- the dispersion stability and storage stability of the copper fine particle dispersion are improved, and the low temperature sinterability and low temperature bondability are improved. It is considered that a bonded body with improved bonding strength can be obtained even after this.
- the copper fine particle dispersion according to the present invention contains copper nanoparticles A (hereinafter also referred to as "copper nanoparticles A").
- the content of copper in the copper nanoparticles A is preferably 95% by mass or more, more preferably 98% by mass or more, from the viewpoint of improving electrical conductivity, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. , more preferably 99% by mass or more, more preferably substantially 100% by mass.
- substantially 100% by mass means that unintentionally contained components may be included. Components that are unintentionally included include, for example, unavoidable impurities.
- the average particle size of the copper nanoparticles A is preferably 100 nm or more, more preferably 130 nm or more, still more preferably 150 nm or more, still more preferably 170 nm or more, from the viewpoint of improving the dispersion stability of the copper fine particle dispersion. From the viewpoint of improving sinterability, low-temperature bondability, and low-temperature bondability after storage, it is preferably 350 nm or less, more preferably 320 nm or less, even more preferably 300 nm or less, and even more preferably 280 nm or less.
- the average particle size of the copper nanoparticles A is measured by the method described in Examples.
- the average particle size of the copper nanoparticles A can be adjusted by the production conditions of the copper nanoparticles A, such as the reduction metal ratio, the type and amount of the carboxylic acid B, and the reduction temperature.
- the content of the copper nanoparticles A in the copper fine particle dispersion according to the present invention is preferably more than 25% by mass, more preferably more than 25% by mass, from the viewpoint of improving low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. 30% by mass or more, more preferably 40% by mass or more, still more preferably 50% by mass or more, still more preferably 55% by mass or more, and preferably 97% by mass from the viewpoint of improving the dispersion stability of the copper fine particle dispersion less than, more preferably 96% by mass or less, still more preferably 93% by mass or less, still more preferably 91% by mass or less.
- the content of copper nanoparticles A in the copper fine particle dispersion according to the present invention is preferably more than 25% by mass and less than 97% by mass, more preferably 30% by mass or more and 96% by mass or less, and further It is preferably 40% by mass or more and 93% by mass or less, more preferably 50% by mass or more and 91% by mass or less, and still more preferably 55% by mass or more and 91% by mass or less.
- the copper nanoparticles A according to the present invention have a carbon number of 6 or more and 14 or less from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage.
- the number of carbon atoms in the carboxylic acid B is 6 or more and 14 or less, preferably 6, from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. 12 or less, more preferably 6 or more and 10 or less, still more preferably 6 or more and 8 or less.
- carboxylic acid B either a linear carboxylic acid or a branched carboxylic acid can be used.
- a linear carboxylic acid is preferable from the viewpoint of improving bondability.
- carboxylic acid B both a saturated carboxylic acid and an unsaturated carboxylic acid can be used, but from the viewpoint of availability, a saturated carboxylic acid is preferable, a saturated aliphatic carboxylic acid is more preferable, and a More preferred are carboxylic acids.
- hexanoic acid, caprylic acid At least one selected from capric acid, lauric acid, and myristic acid is preferable, at least one selected from hexanoic acid, caprylic acid, capric acid, and lauric acid is more preferable, and from hexanoic acid, caprylic acid, and capric acid At least one selected is more preferable, and at least one selected from hexanoic acid and caprylic acid is more preferable.
- the content of the carboxylic acid B in the copper fine particle dispersion according to the present invention improves the dispersion stability of the copper fine particle dispersion, and improves low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. Therefore, it is 0.1% by mass or more, preferably 0.3% by mass or more, more preferably 0.5% by mass or more, and still more preferably 0.6% by mass or more, and improves the dispersion stability of the copper fine particle dispersion.
- the content of carboxylic acid B in the copper fine particle dispersion according to the present invention is preferably 0.1% by mass or more and 7.5% by mass or less, more preferably 0.3% by mass or more. % by mass or less, more preferably 0.3% by mass or more and 5% by mass or less, more preferably 0.5% by mass or more and 4% by mass or less, still more preferably 0.6% by mass or more and 4% by mass or less.
- the copper fine particle dispersion according to the present invention has the following formula (1) from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the low temperature sinterability, low temperature bondability, and low temperature bondability after storage. including compound C shown.
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is the average number of added moles of ethyleneoxy groups and is a number of 0.5 or more and 20 or less.
- the number of carbon atoms in R in formula (1) is 6 or more, preferably 6 or more, preferably 8 or more, and from the viewpoint of improving dispersion stability, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage, 14 or less, preferably 12 or less, more preferably 10 or less, and still more preferably 8 or less. be.
- R in formula (1) may be linear or branched. From the viewpoint of improving the low-temperature bondability, a straight chain is preferred. Moreover, although both a saturated compound and an unsaturated compound can be used as the compound C, a saturated compound is preferable from the viewpoint of availability.
- n in formula (1) is 0.5 or more, preferably 2, from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. Above, more preferably 4 or more, still more preferably 6 or more, from the viewpoint of improving dispersion stability, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage, 20 or less, preferably 15 or less, more It is preferably 12 or less, more preferably 10 or less. Taking these viewpoints together, n in formula (1) is 0.5 or more and 20 or less, preferably 2 or more and 15 or less, more preferably 4 or more and 12 or less, and still more preferably 6 or more and 10 or less.
- R is a linear saturated alkyl group having 6 to 14 carbon atoms, and a compound in which n is 0.5 to 20 is preferable. More preferably, the compound is a chain saturated alkyl group and n is 4 or more and 12 or less. A certain compound is more preferable, and a compound in which R is a linear saturated alkyl group having 8 carbon atoms and n is 6 or more and 10 or less in the formula (1) is more preferable.
- the content of compound C in the copper fine particle dispersion according to the present invention is from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. , 0.05% by mass or more, preferably 0.1% by mass or more, more preferably 0.3% by mass or more, and still more preferably 0.5% by mass or more to improve the dispersion stability of the copper fine particle dispersion.
- the content of compound C in the fine copper particle dispersion according to the present invention is preferably 0.05% by mass or more and 7.5% by mass or less, more preferably 0.05% by mass or more and 6% by mass.
- % or less more preferably 0.1% by mass or more and 5% by mass or less, more preferably 0.3% by mass or more and 3.5% by mass or less, still more preferably 0.5% by mass or more and 2.5% by mass or less, and further It is preferably 0.5% by mass or more and 2% by mass or less, more preferably 0.5% by mass or more and 1.5% by mass or less.
- the total content of the carboxylic acid B and the compound C in the copper fine particle dispersion according to the present invention improves the dispersion stability of the copper fine particle dispersion, resulting in low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage.
- the copper fine particle dispersion is preferably 0.85% by mass or more, more preferably 1% by mass or more, still more preferably 1.3% by mass or more, still more preferably 1.5% by mass or more, from the viewpoint of improving the copper fine particle dispersion From the viewpoint of improving dispersion stability and improving low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage, 8% by mass or less, preferably 7% by mass or less, more preferably 5% by mass or less, and further It is preferably 4.5% by mass or less, more preferably 3% by mass or less.
- the total content of carboxylic acid B and compound C in the fine copper particle dispersion according to the present invention is preferably 0.85% by mass or more and 8% by mass or less, more preferably 0.85% by mass. 7 mass % or more, more preferably 1 mass % or more and 5 mass % or less, still more preferably 1.3 mass % or more and 4.5 mass % or less, still more preferably 1.5 mass % or more and 3 mass % or less.
- the mass ratio of the content of compound C to the content of carboxylic acid B in the copper fine particle dispersion according to the present invention improves the dispersion stability of the copper fine particle dispersion and improves the dispersion stability of the copper fine particle dispersion.
- it is preferably 0.05 or more, more preferably 0.1 or more, still more preferably 0.25 or more, and still more preferably It is 0.3 or more, more preferably 0.4 or more, and is preferable from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage.
- the mass ratio of the content of compound C to the content of carboxylic acid B in the fine copper particle dispersion according to the present invention is preferably 0.05 or more and 9 or less, more preferably 0.05 or more. 7 or less, more preferably 0.1 or more and 6.2 or less, more preferably 0.25 or more and 4 or less, still more preferably 0.3 or more and 3.1 or less, still more preferably 0.4 or more and 0.8 or less .
- the copper fine particle dispersion according to the present invention contains a dispersion medium D from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the storage stability and low-temperature bondability after storage of the copper fine particle dispersion.
- the dispersion medium D is (poly)alkylene glycol, (poly)alkylene glycol from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the storage stability of the copper fine particle dispersion and the low-temperature bonding property after storage. At least one selected from the group consisting of derivatives, terpene alcohol, glycerin (boiling point: 290°C, molecular weight: 92) and glycerin derivatives.
- Examples of (poly)alkylene glycol include ethylene glycol (boiling point: 197°C, molecular weight: 62), propylene glycol (boiling point: 188°C, molecular weight: 76), diethylene glycol (boiling point: 244°C, molecular weight: 106), and triethylene.
- Glycol (boiling point: 287°C, molecular weight: 150), tetraethylene glycol (boiling point: 327°C, molecular weight: 194), dipropylene glycol (boiling point: 232°C, molecular weight: 134), tripropylene glycol (boiling point: 273°C, molecular weight : 192), tetrapropylene glycol (boiling point: 300°C or higher, molecular weight: 250), polyethylene glycol (number average molecular weight is preferably 100 or more and 1000 or less, more preferably 150 or more and 600 or less, still more preferably 180 or more and 500 or less), Polypropylene glycol (number average molecular weight is preferably 150 or more and 1000 or less, more preferably 180 or more and 600 or less, still more preferably 200 or more and 500 or less), 2-ethyl-1,3-hexanediol (boiling point: 244° C.
- the (poly)alkylene glycol derivative includes, for example, a compound in which the terminal hydroxy group of the (poly)alkylene glycol is etherified or esterified.
- Examples of compounds in which the hydroxy groups at both ends of the polyalkylene glycol are etherified or esterified include diethylene glycol dimethyl ether (boiling point: 162° C., molecular weight: 134) and diethylene glycol dibutyl ether (boiling point: 254° C., molecular weight: 218).
- triethylene glycol dimethyl ether (boiling point: 216 ° C., molecular weight: 178), diethylene glycol monoethyl ether acetate (boiling point: 217 ° C., molecular weight: 176), diethylene glycol monobutyl ether acetate (boiling point: 247 ° C., molecular weight: 204) and the like. .
- Examples of compounds in which the hydroxy group at one end of the polyalkylene glycol is etherified or esterified include diethylene glycol monoethyl ether (boiling point: 202°C, molecular weight: 134), diethylene glycol monobutyl ether (boiling point: 231°C, molecular weight: 162) and the like.
- Terpene alcohols include, for example, ⁇ -terpineol (boiling point: 219°C, molecular weight: 154), linalool (boiling point: 198°C, molecular weight: 154), geraniol (229°C, molecular weight: 154), citronellol (boiling point: 225°C, molecular weight: 156) and other monoterpene alcohols.
- the glycerin derivative is not particularly limited, for example, as long as it is a solvent containing a structure derived from glycerin. and propylene oxide adducts).
- polyglycerin include diglycerin and triglycerin.
- examples of commercially available polyglycerin include polyglycerin #310, polyglycerin #500 and polyglycerin #750 manufactured by Sakamoto Yakuhin Kogyo Co., Ltd. etc.
- Ether derivatives of glycerin include, for example, 3-(2-ethylhexyloxy)-1,2-propanediol (boiling point: 325° C., molecular weight: 204).
- Examples of ester derivatives of glycerin include glycerol tributyrate (boiling point: 305° C., molecular weight: 302).
- the dispersion medium D is preferably (poly)alkylene glycol, (poly) from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the storage stability of the copper fine particle dispersion and the low-temperature bonding property after storage.
- the boiling point of the dispersion medium D at 1 atm is preferably 180° C. or higher, more preferably 200° C. or higher, and still more preferably 210° C., from the viewpoint of improving the storage stability of the copper fine particle dispersion and the low-temperature bonding property after storage.
- more preferably 220 ° C. or higher, more preferably 225 ° C. or higher, from the viewpoint of improving low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage preferably 400 ° C. or less, more preferably 360 ° C. 330° C. or less, more preferably 310° C. or less.
- the boiling point of the dispersion medium D is a weighted average value weighted by the content (% by mass) of each dispersion medium.
- the molecular weight of the dispersion medium D is preferably 60 or more, more preferably 100 or more, still more preferably 110 or more, still more preferably 130 or more, from the viewpoint of improving the storage stability of the copper fine particle dispersion and the low-temperature bonding property after storage. From the viewpoint of improving low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage, it is preferably 600 or less, more preferably 450 or less, even more preferably 400 or less, still more preferably 350 or less, and still more preferably 330 or less. When two or more types of dispersion medium D are used in combination, the molecular weight of the dispersion medium D is a weighted average value weighted by the content (% by mass) of each dispersion medium.
- the total content of (poly)alkylene glycol, (poly)alkylene glycol derivative, terpene alcohol, glycerin and glycerin derivative (hereinafter also referred to as “dispersion medium D1”) in dispersion medium D is the storage stability of the copper fine particle dispersion. And from the viewpoint of improving low-temperature bondability after storage, it is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, and still more preferably 95% by mass. Above, more preferably 98% by mass or more, more preferably 99% by mass or more, still more preferably 99.9% by mass or more, still more preferably substantially 100% by mass.
- substantially 100% by mass means that unintentionally contained components may be included. Examples of components that are unintentionally included include a dispersion medium D other than the dispersion medium D1 included in the dispersion medium D1.
- the total content of (poly)alkylene glycol, (poly)alkylene glycol derivative and terpene alcohol (hereinafter also referred to as “dispersion medium D2”) in dispersion medium D is the storage stability of the copper fine particle dispersion and low temperature after storage. From the viewpoint of improving bondability, it is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 80% by mass or more, still more preferably 90% by mass or more, still more preferably 95% by mass or more, and still more preferably It is 98% by mass or more, more preferably 99% by mass or more, still more preferably 99.9% by mass or more, and still more preferably substantially 100% by mass.
- substantially 100% by mass means that unintentionally contained components may be included. Examples of components that are unintentionally included include a dispersion medium D other than the dispersion medium D2 included in the dispersion medium D2.
- the total content of dipropylene glycol, tetraethylene glycol, polyethylene glycol (number average molecular weight of 180 to 500), ⁇ -terpineol, and diethylene glycol monobutyl ether (hereinafter also referred to as "dispersion medium D3") in dispersion medium D is From the viewpoint of improving the storage stability of the fine copper particle dispersion and the low-temperature bondability after storage, the Above, more preferably 95% by mass or more, more preferably 98% by mass or more, still more preferably 99% by mass or more, still more preferably 99.9% by mass or more, still more preferably substantially 100% by mass.
- substantially 100% by mass means that unintentionally contained components may be included. Examples of components that are unintentionally included include a dispersion medium D other than the dispersion medium D3 included in the dispersion medium D3.
- the content of the dispersion medium D in the copper fine particle dispersion according to the present invention is from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the storage stability and low-temperature bonding properties after storage of the copper fine particle dispersion. Therefore, it is preferably 3% by mass or more, more preferably 4% by mass or more, still more preferably 6% by mass or more, still more preferably 6.5% by mass or more, and still more preferably 7.5% by mass or more. It is preferably less than 10% by mass, more preferably 9.9% by mass or less, and still more preferably from the viewpoint of improving the dispersion stability of the copper fine particle dispersion and improving the storage stability of the fine copper particle dispersion and the low-temperature bonding property after storage.
- the content of the dispersion medium D in the fine copper particle dispersion according to the present invention is preferably 3% by mass or more and less than 10% by mass, more preferably 4% by mass or more and 9.9% by mass or less. It is more preferably 6% by mass or more and 9.5% by mass or less, still more preferably 6.5% by mass or more and 9% by mass or less, and still more preferably 7.5% by mass or more and 8.5% by mass or less.
- the content of water in the copper fine particle dispersion according to the present invention is preferably 5 mass from the viewpoint of suppressing oxidation of copper and from the viewpoint of improving the storage stability and low-temperature bondability after storage of the copper fine particle dispersion. % or less, more preferably 1 mass % or less, still more preferably 0.5 mass % or less, still more preferably 0.1 mass % or less, still more preferably 0.01 mass % or less.
- the copper fine particle dispersion according to the present invention may further contain copper microparticles from the viewpoint of improving electrical conductivity, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage.
- the content of copper in the copper microparticles is preferably 95% by mass or more, more preferably 98% by mass or more, from the viewpoint of improving electrical conductivity, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. More preferably 99% by mass or more, more preferably substantially 100% by mass.
- substantially 100% by mass means that unintentionally contained components may be included. Components that are unintentionally included include, for example, unavoidable impurities.
- the average particle size of the copper microparticles is preferably more than 0.35 ⁇ m, more preferably 0.5 ⁇ m or more, and still more preferably 0.5 ⁇ m or more, from the viewpoint of improving electrical conductivity, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage.
- the average particle size of the copper microparticles is measured by the method described in Examples.
- the content of the copper microparticles in the copper fine particle dispersion according to the present invention is preferably 5% by mass or more, from the viewpoint of improving electrical conductivity, low temperature sinterability, low temperature bondability, and low temperature bondability after storage.
- it is preferably 65% by mass or less, more preferably 55% by mass or less, still more preferably 45% by mass or less, and still more preferably 35% by mass or less.
- the mass ratio of the content of copper nanoparticles A to the total content of copper nanoparticles A and copper microparticles in the copper fine particle dispersion according to the present invention is , from the viewpoint of improving electrical conductivity, storage stability of copper fine particle dispersion, low temperature sinterability, low temperature bondability and low temperature bondability after storage, preferably 0.3 or more, more preferably 0.4 or more, and further It is preferably 0.5 or more, more preferably 0.6 or more, and preferably 1.0 or less, more preferably 1.0 or less, more preferably from the viewpoint of improving electrical conductivity, low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage. is 0.9 or less, more preferably 0.8 or less, still more preferably 0.75 or less.
- the content of copper nanoparticles A is preferably more than 25% by mass and less than 97% by mass
- the content of carboxylic acid B is preferably 0.1% by mass or more and 7.5% by mass or less
- the content of compound C is 0.
- the content of the dispersion medium D is preferably 3% by mass or more and less than 10% by mass
- the content of the copper microparticles is preferably 0% by mass or more and 65% by mass or less.
- the fine copper particle dispersion according to the present invention may contain various additives as components other than the above components within a range that does not impair the effects of the present invention.
- the additives include metal particles other than copper nanoparticles A and copper microparticles, sintering accelerators such as glass frit, antioxidants, viscosity modifiers, pH modifiers, buffers, antifoaming agents, leveling agents, volatilization inhibitors and the like.
- metal particles other than copper nanoparticles A and copper microparticles include metal particles of zinc, nickel, silver, gold, palladium, and platinum.
- the content of the additive in the fine copper particle dispersion according to the present invention is preferably 1% by mass or less.
- the copper fine particle dispersion according to the present invention is prepared by adding and mixing carboxylic acid B, compound C and dispersion medium D, copper microparticles and various additives as necessary to copper nanoparticles A prepared in advance by a known method.
- compound C, dispersion medium D, and if necessary, carboxylic acid B, copper microparticles, various additives, etc. are added and mixed.
- dry powder of copper nanoparticles A containing carboxylic acid B in advance (whereinafter, it is preferable to add and mix compound C, dispersion medium D, and optionally carboxylic acid B, copper microparticles, various additives, etc. after obtaining "copper nanoparticle dry powder").
- the copper nanoparticle dry powder is obtained by mixing a copper raw material compound, a reducing agent, and a carboxylic acid B, reducing the copper raw material compound with a reducing agent, and dispersing the copper nanoparticles A in the carboxylic acid B. After that, the dispersion of the copper nanoparticles A can be obtained by drying such as freeze-drying.
- the copper source compound is not particularly limited as long as it is a compound containing copper.
- Examples of copper raw material compounds include copper sulfate, copper nitrate, cupric oxide, cuprous oxide, copper formate, copper acetate, and copper oxalate.
- the copper raw material compounds can be used singly or in combination of two or more.
- the reducing agent is not particularly limited as long as it can reduce the copper source compound.
- reducing agents include hydrazine compounds such as hydrazine, hydrazine hydrochloride, hydrazine sulfate and hydrazine hydrate; boron compounds such as sodium borohydride; sodium sulfite, sodium hydrogen sulfite, sodium thiosulfate, sodium nitrite, hypochlorite Inorganic acid salts such as sodium nitrate, phosphorous acid, sodium phosphite, hypophosphorous acid, sodium hypophosphite and the like.
- the reducing agents may be used singly or in combination of two or more.
- solvents in which the copper raw material compound and reducing agent are dispersed include water, methanol, ethanol, propanol, butanol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, and the like.
- the temperature of the reduction reaction is preferably 5° C. or higher, more preferably 10° C. or higher, still more preferably 20° C. or higher, still more preferably 30° C. or higher, from the viewpoint of reducing and uniformizing the particle size of the copper nanoparticles A. More preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and from the viewpoint of stably producing copper nanoparticles, preferably 100 ° C. or lower, more preferably 90 ° C. or lower, further preferably 80 ° C. or lower. It is preferable to carry out in the range of 75° C. or less.
- the reduction reaction may be performed in an air atmosphere or in an inert gas atmosphere such as nitrogen gas.
- the dispersion of copper nanoparticles A is prepared before freeze-drying. may be purified.
- the method for purifying the dispersion of copper nanoparticles A is not particularly limited, and examples thereof include membrane treatments such as dialysis and ultrafiltration; and methods such as centrifugation. Among them, membrane treatment is preferred, and dialysis is more preferred, from the viewpoint of efficiently removing impurities.
- a material for the dialysis membrane used for dialysis regenerated cellulose is preferable.
- the molecular weight cutoff of the dialysis membrane is preferably 1,000 or more, more preferably 5,000 or more, still more preferably 10,000 or more, and preferably 100,000, from the viewpoint of efficiently removing impurities. 70,000 or less, more preferably 70,000 or less.
- the copper fine particle dispersion according to the present invention can be obtained by further adding the various additives described above as necessary and performing a filtration treatment using a filter or the like.
- the copper fine particle dispersion according to the present invention has good low-temperature sinterability, low-temperature bondability, and low-temperature bondability after storage, so it can be used to form conductive members for various electronic and electrical devices.
- Antenna such as RFID (radio frequency identifier) tag; Capacitor such as MLCC (multilayer ceramic capacitor); Electronic paper; Image display device such as liquid crystal display and organic EL display; Devices; organic transistors; wiring boards such as printed wiring boards and flexible wiring boards; organic solar cells; and sensors such as flexible sensors.
- the copper fine particle dispersion according to the present invention is preferably used for bonding a plurality of metal members.
- a method for producing a joined body according to the present invention includes a step of interposing a copper fine particle dispersion between a plurality of metal members and heating the joined body, wherein the copper fine particle dispersion is It is a copper fine particle dispersion of the invention.
- the copper fine particle dispersion according to the present invention is used for joining a plurality of metal members, it is used in a method for producing a joined body, which includes the step of interposing the copper fine particle dispersion between the plurality of metal members and heating them. is preferred.
- the temperature of the heat treatment in the heating step is preferably 100° C. or higher, more preferably 150° C. or higher, and still more preferably 180° C. or higher from the viewpoint of bonding strength and conductivity. is preferably 230° C. or lower, more preferably 220° C. or lower, still more preferably 210° C. or lower, still more preferably 205° C. or lower, from the viewpoint of improving the
- the heat treatment in the heating step can be performed under pressure or without pressure, but from the viewpoint of bonding strength and conductivity, heat treatment under pressure is preferable.
- the pressure of the heat treatment in the heating step is preferably 5 MPa or more, more preferably 8 MPa or more, still more preferably 10 MPa or more, still more preferably 15 MPa or more, from the viewpoint of improving low-temperature sinterability and low-temperature bondability, From the viewpoint of productivity, it is preferably 50 MPa or less, more preferably 30 MPa or less, still more preferably 25 MPa or less, and even more preferably 20 MPa or less.
- the heat treatment time in the heating step can be appropriately adjusted depending on the temperature and pressure of the heat treatment.
- the atmosphere in the heating step may be an air atmosphere, an inert gas atmosphere such as nitrogen gas, or a reducing gas atmosphere such as hydrogen gas. Nitrogen gas atmosphere is more preferable from the viewpoint of properties.
- metal members to be bonded in the present invention include gold substrates, gold-plated substrates, silver substrates, silver-plated metal substrates, copper substrates, palladium substrates, palladium-plated metal substrates, platinum substrates, platinum-plated metal substrates, aluminum substrates, nickel substrates, metal substrates such as nickel-plated metal substrates, tin substrates, tin-plated metal substrates, or metal substrates; and metal parts such as electrodes of electrically insulating substrates.
- the plurality of metal members used in the present invention may be metal members of the same type or metal members of different types.
- the metal member is preferably a gold substrate, a gold-plated substrate, a silver substrate, a silver-plated metal substrate, a copper substrate, a palladium substrate, a palladium-plated metal substrate, a platinum substrate, a platinum-plated metal substrate, an aluminum substrate, a nickel substrate, or a nickel substrate. It contains at least one selected from a plated metal substrate, a tin substrate, a tin-plated metal substrate, and a metal portion of an electrically insulating substrate.
- Bonding of metal members in the present invention includes bonding of chip parts such as capacitors and resistors to circuit boards; bonding of semiconductor chips such as memories, diodes, transistors, ICs and CPUs to lead frames or circuit boards; semiconductors with high heat generation. It can be used for joining a chip and a cooling plate.
- Examples of the method of applying the copper fine particle dispersion to the metal member include various coating methods such as slot die coating, dip coating, spray coating, spin coating, doctor blading, knife edge coating, and bar coating; stencil printing, screen printing, Examples include various patterning printing methods such as flexographic printing, gravure printing, offset printing, dispenser printing, and inkjet printing.
- the amount of the fine copper particle dispersion to be applied to the metal member can be appropriately adjusted according to the size and type of the metal member to be joined.
- the bonding strength of the bonded body is preferably 10 MPa or more, more preferably 15 MPa or more.
- the bonding strength can be measured by the method described in Examples.
- the present invention further discloses the following embodiments.
- ⁇ 1> Containing copper nanoparticles A, a carboxylic acid B having 6 to 14 carbon atoms, a compound C represented by the following formula (1), and a dispersion medium D
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives,
- the content of the carboxylic acid B is 0.1% by mass or more
- the content of the compound C is 0.05% by mass or more
- a copper fine particle dispersion wherein the total content of the carboxylic acid B and the compound C is 8% by mass or less.
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is an average number of added moles of ethyleneoxy groups, and is a number of 0.5 or more and 20 or less.
- ⁇ 2> Containing copper nanoparticles A, a carboxylic acid B having 6 to 14 carbon atoms, a compound C represented by the following formula (1), and a dispersion medium D
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives,
- the content of the copper nanoparticles A is more than 25% by mass and less than 97% by mass
- the content of the carboxylic acid B is 0.1% by mass or more and 7.5% by mass or less
- the content of the compound C is 0.05% by mass or more and 7.5% by mass or less
- the total content of the carboxylic acid B and the compound C is 0.85% by mass or more and 8% by mass or less
- the copper fine particle dispersion according to ⁇ 1>, wherein the dispersion medium D has a boiling point of 180°C or higher and 400°C
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is an average number of added moles of ethyleneoxy groups, and is a number of 0.5 or more and 20 or less.
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives,
- the content of the copper nanoparticles A is more than 25% by mass and less than 97% by mass
- the content of the carboxylic acid B is 0.1% by mass or more and 7.5% by mass or less
- the content of the compound C is 0.05% by mass or more and 7.5% by mass or less
- the total content of the carboxylic acid B and the compound C is 0.85% by mass or more and 8% by mass or less
- the copper fine particle dispersion according to ⁇ 1> or ⁇ 2>, wherein the dispersion medium D has a molecular weight of 60 or more and 600 or less.
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is an average number of added moles of ethyleneoxy groups, and is a number of 0.5 or more and 20 or less.
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives, terpene alcohols, glycerin and glycerin derivatives,
- the content of the copper nanoparticles A is 40% by mass or more and 93% by mass or less
- the content of the carboxylic acid B is 0.3% by mass or more and 6% by mass or less
- the content of the compound C is 0.05% by mass or more and 6% by mass or less
- the total content of the carboxylic acid B and the compound C is 0.85% by mass or more and 7% by mass or less
- the boiling point of the dispersion medium D is 180° C.
- the copper fine particle dispersion according to any one of ⁇ 1> to ⁇ 3>, wherein the dispersion medium D has a molecular weight of 60 or more and 600 or less.
- R is a hydrocarbon group having 6 or more and 14 or less carbon atoms
- n is an average number of added moles of ethyleneoxy groups, and is a number of 4 or more and 12 or less.
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives and terpene alcohols,
- the content of the copper nanoparticles A is 50% by mass or more and 91% by mass or less
- the content of the carboxylic acid B is 0.3% by mass or more and 6% by mass or less
- the content of the compound C is 0.05% by mass or more and 6% by mass or less
- the total content of the carboxylic acid B and the compound C is 0.85% by mass or more and 7% by mass or less
- the boiling point of the dispersion medium D is 200° C.
- the copper fine particle dispersion according to any one of ⁇ 1> to ⁇ 4>, wherein the dispersion medium D has a molecular weight of 100 or more and 450 or less.
- RO—(CH 2 CH 2 O) n —CH 2 —COOH (1) [In the formula (1), R is a hydrocarbon group having 8 or more and 12 or less carbon atoms, and n is an average number of added moles of ethyleneoxy groups, and is a number of 4 or more and 12 or less.
- the dispersion medium D contains at least one selected from the group consisting of (poly)alkylene glycol, (poly)alkylene glycol derivatives and terpene alcohols,
- the content of the copper nanoparticles A is 50% by mass or more and 91% by mass or less
- the content of the carboxylic acid B is 0.5% by mass or more and 4% by mass or less
- the content of the compound C is 0.5% by mass or more and 2.5% by mass or less
- the total content of the carboxylic acid B and the compound C is 1% by mass or more and 5% by mass or less
- the boiling point of the dispersion medium D is 220° C.
- the dispersion medium D has a molecular weight of 130 or more and 400 or less,
- RO—(CH 2 CH 2 O) n —CH 2 —COOH (1) [In Formula (1), R is a hydrocarbon group having 8 or more and 12 or less carbon atoms, and n is an average number of added moles of ethyleneoxy groups, and is a number of 6 or more and 10 or less.
- ⁇ 7> The copper fine particle dispersion according to any one of ⁇ 1> to ⁇ 6>, wherein the copper nanoparticles A have an average particle size of 100 nm or more and 350 nm or less.
- ⁇ 8> The fine copper particle dispersion according to any one of ⁇ 1> to ⁇ 7>, wherein the mass ratio of the content of the compound C to the content of the carboxylic acid B is 0.05 or more and 9 or less.
- the dispersion medium D contains at least one selected from dipropylene glycol, tetraethylene glycol, polyethylene glycol having a number average molecular weight of 180 to 500, ⁇ -terpineol, and diethylene glycol monobutyl ether.
- ⁇ 11> The copper microparticle dispersion according to ⁇ 10>, wherein the content of the copper microparticles is 5% by mass or more and 65% by mass or less.
- ⁇ 12> The fine copper particle dispersion according to any one of ⁇ 1> to ⁇ 11>, which is used for joining a plurality of metal members.
- ⁇ 13> A method for producing a joined body, comprising the step of interposing the copper fine particle dispersion according to any one of ⁇ 1> to ⁇ 11> between a plurality of metal members and heating the same.
- ⁇ 14> The method for manufacturing a joined body according to ⁇ 13>, wherein the temperature of the heat treatment in the heating step is 230° C. or less.
- the metal member is a gold substrate, a gold-plated substrate, a silver substrate, a silver-plated metal substrate, a copper substrate, a palladium substrate, a palladium-plated metal substrate, a platinum substrate, a platinum-plated metal substrate, an aluminum substrate, a nickel substrate, a nickel-plated metal substrate, and a tin substrate. , a tin-plated metal substrate, and a metal portion of an electrically insulating substrate.
- the bonding of the metal member is any one selected from the group consisting of bonding between a chip component and a circuit board, bonding between a semiconductor chip and a lead frame or a circuit board, and bonding between a high heat generating semiconductor chip and a cooling plate.
- the content of carboxylic acid B was calculated by the following formula, where the mass decrease from 35°C to 550°C was the mass of carboxylic acid B, and the residual mass at 550°C was the mass of copper nanoparticles A.
- Content of carboxylic acid B [mass%] 100 x (mass loss from 35°C to 550°C)/(mass loss from 35°C to 550°C + residual mass at 550°C)
- hydrazine monohydrate (special grade reagent manufactured by Fuji Film Wako Pure Chemical Industries, Ltd.) placed in a 50 mL dropping funnel was added dropwise to the mixed solution at 25° C. over 20 minutes. Thereafter, the reaction solution was stirred for 1 hour while controlling the temperature of the reaction solution at 70° C. in an oil bath, and then air-cooled to obtain a reddish brown dispersion containing copper nanoparticles. The entire amount of the resulting dispersion is placed in a centrifuge sedimentation tube 500PA bottle manufactured by Hitachi Koki Co., Ltd.
- the obtained copper nanoparticles had an average particle diameter of 250 nm and a hexanoic acid content of 0.9% by mass.
- Synthesis Example 2 (Production of copper nanoparticles A3) A dry powder of copper nanoparticles A3 containing stearic acid was obtained in the same manner as in Synthesis Example 1 except that hexanoic acid was changed to stearic acid.
- the obtained copper nanoparticles A3 had an average particle diameter of 240 nm and a stearic acid content of 1.0% by mass.
- Synthesis Example 4 (Production of copper microparticles a2) A dry powder of copper microparticles a2 containing lauric acid was obtained in the same manner as in Synthesis Example 3 except that lauric acid was used instead of hexanoic acid.
- the obtained copper microparticles a2 had an average particle diameter of 1.1 ⁇ m and a lauric acid content of 0.3% by mass.
- Synthesis Example 6 (manufacture of compound C2) Compound C2 was obtained in the same manner as in Synthesis Example 5.
- R in compound C2 is a lauryl group and n is 10.
- Synthesis Example 7 (manufacture of compound C3) Compound C3 was obtained in the same manner as in Synthesis Example 5.
- R in compound C3 is a lauryl group and n is 6.
- Synthesis Example 8 (manufacture of compound C4) Compound C4 was obtained in the same manner as in Synthesis Example 5.
- R of compound C4 is an oleyl group and n is 9.
- Example 1 (Preparation of fine copper particle dispersion) Dipropylene glycol (manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd., first grade reagent) 0.49 g, tetraethylene glycol (manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd., first grade reagent) 0.5 g, hexanoic acid obtained in Synthesis Example 1 9.0 g of dry powder of copper nanoparticles A1 containing, 0.01 g of compound C1 obtained in Synthesis Example 5 are added to an agate mortar and kneaded until the dry powder is visually invisible, and the resulting mixture is placed in a plastic bottle. moved.
- the sealed plastic bottle is stirred for 5 minutes at 2000 min ⁇ 1 (2000 rpm) using a rotation and revolution stirrer (Planetary Vacuum Mixer ARV-310, manufactured by Thinky Co., Ltd.) to obtain the copper fine particle dispersion 1. Obtained.
- a joined body was produced according to the following method. First, a stainless steel metal mask (thickness: 150 ⁇ m) having three rows of 6 mm ⁇ 6 mm square openings was placed on a 30 mm ⁇ 30 mm copper plate (total thickness: 1 mm), and copper fine particles were obtained by stencil printing using a metal squeegee. The dispersion was coated onto a copper plate. After that, it was dried at 120° C. for 10 minutes on a shamal hot plate (manufactured by AS ONE Corporation, HHP-441) in the atmosphere.
- a 5 mm ⁇ 5 mm silicon chip (thickness: 400 ⁇ m) was prepared by sputtering titanium, nickel, and gold in this order.
- the silicon chip was placed so as to be in contact with the dispersion.
- a laminate was obtained in which the copper plate, the copper fine particle dispersion, and the silicon chip were laminated in this order.
- the obtained laminate was fired by the following method to obtain a joined body. First, the laminate was set in a pressure firing machine (manufactured by Meisho Kiko Co., Ltd., HTM-1000), and nitrogen was flowed into the furnace at 500 mL/min to replace the air in the furnace with nitrogen. Thereafter, the temperature of the heating head was raised to 200° C.
- the heating head was water-cooled at -60°C/min, and the joined body was taken out into the air at 100°C or less.
- Example 2-18, Comparative Examples 1-8 The same procedure as in Example 1 was repeated except that the composition of the fine copper particle dispersion was changed to that shown in Table 1, to obtain copper fine particle dispersions and joined bodies of Examples 2 to 18 and Comparative Examples 1 to 8, respectively.
- Raw materials used for producing the copper fine particle dispersion are shown below. Dry powder of copper nanoparticles A2 containing lauric acid (manufactured by Mitsui Kinzoku Mining Co., Ltd., CH200L1, average particle size 190 nm, lauric acid content 1.3% by mass) Hexanoic acid (manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd., special grade reagent) Lauric acid (manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd., first grade reagent) Stearic acid (special grade reagent manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd.) Dipropylene glycol (DPG, manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd., first grade reagent) Tetraethylene glycol (TEG, manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., first grade reagent) PEG200 (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd
- the bonding strength of the bonded body was measured according to the following procedure. Using a universal bond tester (Prospector, manufactured by Nordson Advanced Technologies, Inc.), the silicon chip of the bonded body was pressed horizontally at a test speed of 5 mm/min and a shear height of 50 ⁇ m to measure the die shear strength of the bonded body. Three bonded bodies were measured, and the average value of the values obtained by measuring the three bonded bodies was taken as the bonding strength of the bonded body. Table 2 shows the results.
- the copper fine particle dispersions of Examples 1 to 18 exhibited improved bonding strength even when pressure-fired at 200° C. under nitrogen, and the bonding strength of the bonded bodies obtained even after storage for one month was good. there were.
- the copper fine particle dispersions of Comparative Examples 1 to 8 could not be dispersed. From the above, it can be seen that the fine copper particle dispersion of the present invention has improved bonding strength and good storage stability even under the conditions of sintering at 200° C. under nitrogen.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
銅は熱伝導性に優れているため、被接合物を接合するためのはんだの代替材料としても用いられることがある。
また、特開2017-172003号(特許文献2)には、簡易に単分散の銅ナノ粒子を得ることが可能な銅ナノ粒子の製造方法を提供することを目的として、銅を含む第1の金属塩と、錯化剤と、分散剤と、銅よりイオン化傾向の低い金属を含む第2の金属塩と、を水に溶解させ、反応溶液を調製する調製工程と、反応溶液を撹拌させながら、還元剤を添加し、銅ナノ粒子を析出させる析出工程と、を備えることを特徴とする銅ナノ粒子の製造方法が記載されている。
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記カルボン酸Bの含有量が0.1質量%以上であり、
前記化合物Cの含有量が0.05質量%以上であり、
前記カルボン酸Bと前記化合物Cの合計含有量が8質量%以下である、銅微粒子分散体に関する。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。〕
特許文献1に記載された、疎水性のラウリン酸が施された銅微粒子を親水性のポリエチレングリコールで分散した銅ペーストは、一か月保存後に接合体を作製した場合、得られた接合体の接合強度に不良が見られた。これは、銅ペーストの分散不良が原因であると考えられる。
また、特許文献2に記載された銅ナノ粒子水性分散液は、焼成時に銅微粒子を保護したポリビニルピロリドン及びポリビニルアルコールの除去が不十分であるため、得られる接合体の接合強度に不良が見られた。
そのため、銅微粒子分散体の保存安定性及び接合性の更なる改善が求められている。
本発明は、一定期間保存した後も接合強度が向上した接合体を得ることができる銅微粒子分散体、及び該銅微粒子分散体を用いる接合体の製造方法に関する。
すなわち、本発明は、次の[1]及び[2]に関する。
[1]銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記カルボン酸Bの含有量が0.1質量%以上であり、
前記化合物Cの含有量が0.05質量%以上であり、
前記カルボン酸Bと前記化合物Cの合計含有量が8質量%以下である、銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。〕
[2]前記[1]に記載の銅微粒子分散体を複数の金属部材の間に介在させて加熱する工程を含む、接合体の製造方法。
本発明の銅微粒子分散体は、銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、カルボン酸Bの含有量が0.1質量%以上であり、化合物Cの含有量が0.05質量%以上であり、カルボン酸Bと化合物Cの合計含有量が8質量%以下である。
RO-(CH2CH2O)n-CH2-COOH (1)
式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。
なお、本明細書において、「低温下での焼結性」とは、低温窒素雰囲気下において金属焼結が起こることを意味し、「低温焼結性」ともいう。また、低温窒素雰囲気下での複数の金属部材の接合性を「低温接合性」ともいう。また、例えば銅微粒子分散体を25℃、湿度50%の条件下で一か月保存した後の低温接合性を「保存後の低温接合性」ともいう。
また、本明細書において、「低温」とは、銀ナノ粒子分散体を用いた場合の一般的な焼結温度(250~300℃程度)よりも低い温度であることを意味し、例えば100~230℃程度の温度範囲をいい、より低い温度で焼結性及び接合性が向上することが好ましい。
本発明に係る銅微粒子分散体に含まれる銅ナノ粒子Aは、炭素数6以上14以下のカルボン酸B及び前記式(1)で示される化合物Cにより、(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含む分散媒D中に分散されていると考えられる。
炭素数6以上14以下のカルボン酸Bは銅ナノ粒子Aに対する配位性は良好であるが、疎水性が強いため、カルボン酸Bが配位した銅ナノ粒子Aは親水性の分散媒Dへの分散性に劣っていると考えられる。ここで、炭素数6以上14以下の炭化水素基、カルボキシ基及びエチレンオキシ基を有する化合物Cは、親水性基及び疎水性基をバランス良く含むため、疎水性のカルボン酸B及び親水性の分散媒Dに対する相溶性がそれぞれ良好であると考えられる。そのため、銅ナノ粒子Aを分散媒Dに分散させるために、炭素数6以上14以下のカルボン酸B及び前記式(1)で示される化合物Cを組み合わせて用いることにより、カルボン酸Bが配位した銅ナノ粒子Aの分散媒Dへの分散性が効果的に向上し、銅微粒子分散体の分散安定性及び保存安定性が向上すると考えられる。
また、炭素数6以上14以下のカルボン酸Bは低分子配位子のため揮発しやすく、さらに化合物Cのエチレンオキシ基は銅ナノ粒子Aにより低温で分解しやすい。そのため、銅ナノ粒子Aを焼結するときは、カルボン酸B及び化合物Cは接合の邪魔をしない。そのため、低温窒素雰囲気下においても銅ナノ粒子A同士が近接するため、低温焼結性及び低温接合性が向上すると考えらえる。
以上の理由から、本発明の銅微粒子分散体によれば、銅微粒子分散体の分散安定性及び保存安定性が向上するとともに、低温焼結性及び低温接合性が向上するため、一定期間保存した後も接合強度が向上した接合体を得ることができると考えられる。
本発明に係る銅微粒子分散体は、銅ナノ粒子A(以下、「銅ナノ粒子A」ともいう)を含有する。
銅ナノ粒子A中の銅の含有量は、導電性、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、好ましくは95質量%以上、より好ましくは98質量%以上、更に好ましくは99質量%以上、更に好ましくは実質的に100質量%である。
ここで「実質的100質量%」とは、意図せずに含まれる成分を含みうることを意味する。意図せずに含まれる成分としては、例えば、不可避的不純物が挙げられる。
銅ナノ粒子Aの平均粒径は、実施例に記載の方法により測定される。
銅ナノ粒子Aの平均粒径は、還元金属率、カルボン酸Bの種類や量及び還元温度等の銅ナノ粒子Aの製造条件等によって、調整することができる。
本発明に係る銅ナノ粒子Aは、銅微粒子分散体の分散安定性を向上させて、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、炭素数6以上14以下のカルボン酸Bで分散されてなる。
カルボン酸Bの炭素数は、銅微粒子分散体の分散安定性を向上させて、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、6以上14以下、好ましくは6以上12以下、より好ましくは6以上10以下、更に好ましくは6以上8以下である。
また、カルボン酸Bとしては飽和カルボン酸及び不飽和カルボン酸のいずれも用いることができるが、入手容易性の観点から、飽和カルボン酸が好ましく、飽和脂肪族カルボン酸がより好ましく、飽和脂肪族1価カルボン酸が更に好ましい。
飽和脂肪族1価カルボン酸としては、銅微粒子分散体の分散安定性を向上させて、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、ヘキサン酸、カプリル酸、カプリン酸、ラウリン酸、及びミリスチン酸から選択される少なくとも一種が好ましく、ヘキサン酸、カプリル酸、カプリン酸、及びラウリン酸から選択される少なくとも一種がより好ましく、ヘキサン酸、カプリル酸、及びカプリン酸から選択される少なくとも一種が更に好ましく、ヘキサン酸及びカプリル酸から選択される少なくとも一種が更に好ましい。
本発明に係る銅微粒子分散体は、銅微粒子分散体の分散安定性を向上させて、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、下記式(1)で示される化合物Cを含む。
RO-(CH2CH2O)n-CH2-COOH (1)
式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。
また、化合物Cとしては飽和化合物及び不飽和化合物のいずれも用いることができるが、入手容易性の観点から、飽和化合物が好ましい。
本発明に係る銅微粒子分散体は、銅微粒子分散体の分散安定性を向上させて、銅微粒子分散体の保存安定性及び保存後の低温接合性を向上させる観点から、分散媒Dを含む。
分散媒Dは、銅微粒子分散体の分散安定性を向上させて、銅微粒子分散体の保存安定性及び保存後の低温接合性を向上させる観点から、(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン(沸点:290℃、分子量:92)及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含む。
前記ポリアルキレングリコールの両末端のヒドロキシ基がエーテル化又はエステル化された化合物としては、例えば、ジエチレングリコールジメチルエーテル(沸点:162℃、分子量:134)、ジエチレングリコールジブチルエーテル(沸点:254℃、分子量:218)、トリエチレングリコールジメチルエーテル(沸点:216℃、分子量:178)、ジエチレングリコールモノエチルエーテルアセテート(沸点:217℃、分子量:176)、ジエチレングリコールモノブチルエーテルアセテート(沸点:247℃、分子量:204)等が挙げられる。
前記ポリアルキレングリコールの片末端のヒドロキシ基がエーテル化又はエステル化された化合物としては、例えば、ジエチレングリコールモノエチルエーテル(沸点:202℃、分子量:134)、ジエチレングリコールモノブチルエーテル(沸点:231℃、分子量:162)等が挙げられる。
本発明に係る銅微粒子分散体は、導電性、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、銅マイクロ粒子を更に含有してもよい。
銅マイクロ粒子中の銅の含有量は、導電性、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、好ましくは95質量%以上、より好ましくは98質量%以上、更に好ましくは99質量%以上、更に好ましくは実質的に100質量%である。
ここで「実質的100質量%」とは、意図せずに含まれる成分を含みうることを意味する。意図せずに含まれる成分としては、例えば、不可避的不純物が挙げられる。
銅マイクロ粒子の平均粒径は、実施例に記載の方法により測定される。
本発明に係る銅微粒子分散体において、銅微粒子分散体の分散安定性、銅微粒子分散体の保存安定性、導電性、低温焼結性、低温接合性及び保存後の低温接合性を向上させる観点から、銅ナノ粒子Aの含有量が好ましくは25質量%超97質量%未満、カルボン酸Bの含有量が好ましくは0.1質量%以上7.5質量%以下、化合物Cの含有量が0.05質量%以上7.5質量%以下、分散媒Dの含有量が好ましくは3質量%以上10質量%未満、銅マイクロ粒子の含有量が好ましくは0質量%以上65質量%以下である。
本発明に係る銅微粒子分散体中の添加剤の含有量は、1質量%以下であることが好ましい。
本発明に係る銅微粒子分散体は、公知の方法により予め調製した銅ナノ粒子Aにカルボン酸B、化合物C及び分散媒D、必要に応じて銅マイクロ粒子や各種添加剤等を添加及び混合する方法;銅原料化合物、還元剤、及びカルボン酸B、必要に応じて銅原料化合物及び還元剤を分散させるための溶媒を混合して、該銅原料化合物を還元して銅ナノ粒子Aの分散体を得た後、化合物C、分散媒D及び必要に応じてカルボン酸Bや銅マイクロ粒子、各種添加剤等を添加及び混合する方法等により得ることができる。中でも、銅微粒子分散体の分散安定性を向上させて、銅微粒子分散体の保存安定性及び保存後の低温接合性を向上させる観点から、予めカルボン酸Bを含む銅ナノ粒子Aの乾燥粉(以下、「銅ナノ粒子乾燥粉」ともいう)を得た後、化合物C、分散媒D及び必要に応じてカルボン酸Bや銅マイクロ粒子、各種添加剤等を添加及び混合する方法が好ましい。
銅ナノ粒子乾燥粉は、銅原料化合物、還元剤、及びカルボン酸Bを混合し、該銅原料化合物が還元剤により還元され、カルボン酸Bで分散されてなる銅ナノ粒子Aの分散体を得た後、該銅ナノ粒子Aの分散体を凍結乾燥等により乾燥させて得ることができる。
銅原料化合物としては、例えば、硫酸銅、硝酸銅、酸化第二銅、酸化第一銅、ギ酸銅、酢酸銅、シュウ酸銅等が挙げられる。銅原料化合物は、1種を単独で又は2種以上を混合して用いることができる。
還元剤としては、例えば、ヒドラジン、塩酸ヒドラジン、硫酸ヒドラジン及び抱水ヒドラジン等のヒドラジン系化合物;水素化ホウ素ナトリウム等のホウ素化合物;亜硫酸ナトリウム、亜硫酸水素ナトリウム、チオ硫酸ナトリウム、亜硝酸ナトリウム、次亜硝酸ナトリウム、亜リン酸、亜リン酸ナトリウム、次亜リン酸、次亜リン酸ナトリウム等の無機酸塩等が挙げられる。
還元剤は、1種を単独で又は2種以上を組み合わせて用いてもよい。
銅ナノ粒子Aの分散体を精製する方法は、特に制限はなく、透析、限外濾過等の膜処理;遠心分離処理等の方法が挙げられる。中でも、不純物を効率的に除去する観点から、膜処理が好ましく、透析がより好ましい。透析に用いる透析膜の材質としては、再生セルロースが好ましい。
透析膜の分画分子量は、不純物を効率的に除去する観点から、好ましくは1,000以上、より好ましくは5,000以上、更に好ましくは10,000以上であり、そして、好ましくは100,000以下、より好ましくは70,000以下である。
本発明に係る銅微粒子分散体は、更に必要に応じて前述の各種添加剤を添加し、フィルター等による濾過処理を行うことにより得ることができる。
本発明に係る接合体の製造方法は、銅微粒子分散体を複数の金属部材の間に介在させて加熱する工程を含む、接合体の製造方法であって、銅微粒子分散体が、前述の本発明の銅微粒子分散体である。
本発明に係る銅微粒子分散体は、複数の金属部材の接合に用いる場合、該銅微粒子分散体を複数の金属部材の間に介在させて加熱する工程を含む、接合体の製造方法に用いることが好ましい。
前記加熱する工程における加熱処理は、無加圧下及び加圧下のいずれでも行うことができるが、接合強度及び導電性の観点から、加圧下が好ましい。前記加熱する工程における加熱処理の圧力は、低温焼結性及び低温接合性を向上させる観点から、好ましくは5MPa以上、より好ましくは8MPa以上、更に好ましくは10MPa以上、更に好ましくは15MPa以上であり、生産性の観点から、好ましくは50MPa以下、より好ましくは30MPa以下、更に好ましくは25MPa以下、更に好ましくは20MPa以下である。
前記加熱する工程における加熱処理の時間は、加熱処理の温度や圧力によって適宜調整することができる。
前記加熱する工程における雰囲気は、空気雰囲気であってもよく、窒素ガス等の不活性ガス雰囲気であってもよく、水素ガス等の還元性ガス雰囲気下でもよいが、銅の酸化の抑制と安全性の観点から、窒素ガス雰囲気がより好ましい。
これらの中でも、金属部材は、好ましくは金基板、金メッキ基板、銀基板、銀メッキ金属基板、銅基板、パラジウム基板、パラジウムメッキ金属基板、プラチナ基板、プラチナメッキ金属基板、アルミニウム基板、ニッケル基板、ニッケルメッキ金属基板、スズ基板、スズメッキ金属基板、及び電気絶縁性基板の金属部分から選ばれる少なくとも1種を含む。
本発明における金属部材の接合は、コンデンサ、抵抗等のチップ部品と回路基板との接合;メモリ、ダイオード、トランジスタ、IC、CPU等の半導体チップとリードフレーム又は回路基板との接合;高発熱の半導体チップと冷却板との接合等に用いることができる。
前記銅微粒子分散体の金属部材への付与量は、接合する金属部材の大きさ、種類に応じて適宜調整することができる。
<1>
銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記カルボン酸Bの含有量が0.1質量%以上であり、
前記化合物Cの含有量が0.05質量%以上であり、
前記カルボン酸Bと前記化合物Cの合計含有量が8質量%以下である、銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。〕
<2>
銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記銅ナノ粒子Aの含有量が25質量%超97質量%未満であり、
前記カルボン酸Bの含有量が0.1質量%以上7.5質量%以下であり、
前記化合物Cの含有量が0.05質量%以上7.5質量%以下であり、
前記カルボン酸Bと前記化合物Cの合計含有量が0.85質量%以上8質量%以下であり、
前記分散媒Dの沸点が180℃以上400℃以下である、<1>に記載の銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。〕
<3>
銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記銅ナノ粒子Aの含有量が25質量%超97質量%未満であり、
前記カルボン酸Bの含有量が0.1質量%以上7.5質量%以下であり、
前記化合物Cの含有量が0.05質量%以上7.5質量%以下であり、
前記カルボン酸Bと前記化合物Cの合計含有量が0.85質量%以上8質量%以下であり、
前記分散媒Dの分子量が60以上600以下である、<1>又は<2>に記載の銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。〕
<4>
銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記銅ナノ粒子Aの含有量が40質量%以上93質量%以下であり、
前記カルボン酸Bの含有量が0.3質量%以上6質量%以下であり、
前記化合物Cの含有量が0.05質量%以上6質量%以下であり、
前記カルボン酸Bと前記化合物Cの合計含有量が0.85質量%以上7質量%以下であり、
前記分散媒Dの沸点が180℃以上400℃以下であり、
前記分散媒Dの分子量が60以上600以下である、<1>~<3>のいずれかに記載の銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、4以上12以下の数である。〕
<5>
銅ナノ粒子A、炭素数6以上12以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体及びテルペンアルコールからなる群から選ばれる少なくとも1種を含み、
前記銅ナノ粒子Aの含有量が50質量%以上91質量%以下であり、
前記カルボン酸Bの含有量が0.3質量%以上6質量%以下であり、
前記化合物Cの含有量が0.05質量%以上6質量%以下であり、
前記カルボン酸Bと前記化合物Cの合計含有量が0.85質量%以上7質量%以下であり、
前記分散媒Dの沸点が200℃以上400℃以下であり、
前記分散媒Dの分子量が100以上450以下である、<1>~<4>のいずれかに記載の銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数8以上12以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、4以上12以下の数である。〕
<6>
銅ナノ粒子A、炭素数6以上12以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体及びテルペンアルコールからなる群から選ばれる少なくとも1種を含み、
前記銅ナノ粒子Aの含有量が50質量%以上91質量%以下であり、
前記カルボン酸Bの含有量が0.5質量%以上4質量%以下であり、
前記化合物Cの含有量が0.5質量%以上2.5質量%以下であり、
前記カルボン酸Bと前記化合物Cの合計含有量が1質量%以上5質量%以下であり、
前記分散媒Dの沸点が220℃以上400℃以下であり、
前記分散媒Dの分子量が130以上400以下であり、
前記分散剤Dの含有量が3質量%以上10質量%未満である、<1>~<5>のいずれかに記載の銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数8以上12以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、6以上10以下の数である。〕
<7>
前記銅ナノ粒子Aの平均粒径が100nm以上350nm以下である、<1>~<6>のいずれかに記載の銅微粒子分散体。
<8>
前記カルボン酸Bの含有量に対する前記化合物Cの含有量の質量比が0.05以上9以下である、<1>~<7>のいずれかに記載の銅微粒子分散体。
<9>
前記分散媒Dがジプロピレングリコール、テトラエチレングリコール、数平均分子量180以上500以下のポリエチレングリコール、α-テルピネオール、及びジエチレングリコールモノブチルエーテルから選ばれる少なくとも1種を含む、<1>~<8>のいずれかに記載の銅微粒子分散体。
<10>
銅マイクロ粒子を更に含有し、前記銅マイクロ粒子の平均粒径が0.35μm超10μm以下である、<1>~<9>のいずれかに記載の銅微粒子分散体。
<11>
前記銅マイクロ粒子の含有量が5質量%以上65質量%以下である、<10>に記載の銅微粒子分散体。
<12>
複数の金属部材の接合に用いる、<1>~<11>のいずれかに記載の銅微粒子分散体。
<13>
<1>~<11>のいずれかに記載の銅微粒子分散体を複数の金属部材の間に介在させて加熱する工程を含む、接合体の製造方法。
<14>
前記加熱する工程における加熱処理の温度が230℃以下である、<13>に記載の接合体の製造方法。
<15>
前記加熱する工程における雰囲気が不活性ガス雰囲気である、<13>又は<14>に記載の接合体の製造方法。
<16>
前記金属部材が金基板、金メッキ基板、銀基板、銀メッキ金属基板、銅基板、パラジウム基板、パラジウムメッキ金属基板、プラチナ基板、プラチナメッキ金属基板、アルミニウム基板、ニッケル基板、ニッケルメッキ金属基板、スズ基板、スズメッキ金属基板、及び電気絶縁性基板の金属部分からなる群から選ばれる少なくとも1種を含む、<13>~<15>のいずれかに記載の接合体の製造方法。
<17>
前記金属部材の接合がチップ部品と回路基板との接合、半導体チップとリードフレーム又は回路基板との接合、及び高発熱の半導体チップと冷却板との接合からなる群から選ばれるいずれかである、<13>~<16>のいずれかに記載の接合体の製造方法。
また、以下の製造例、実施例及び比較例において、「部」及び「%」は特記しない限り「質量部」及び「質量%」である。
各種物性は、以下の方法により測定又は算出した。
走査型電子顕微鏡(株式会社日立ハイテク製、電解放出型走査電子顕微鏡:S-4800)を用い、銅ナノ粒子A及び銅マイクロ粒子の走査型電子顕微鏡(SEM)像を撮影した。倍率は粒子の粒径に応じて決定し、5000倍から150000倍の範囲で撮影を行った。画像解析ソフトImageJ(アメリカ国立衛生研究所)を用いてSEM像を解析し、1サンプルあたり100個以上の粒子について粒径を求め、それらの算術平均値を銅ナノ粒子A及び銅マイクロ粒子の平均粒径とした。
示差熱熱重量同時測定装置(TG/DTA)(株式会社日立ハイテクサイエンス社製、商品名:STA7200RV)を用いて、試料(カルボン酸Bを含む銅ナノ粒子Aの乾燥粉)10mgをアルミパンセルに計量し、50mL/分の窒素フロー下で10℃/分の昇温速度で35℃から550℃まで昇温し、質量減少量を測定した。35℃から550℃までの質量減少量をカルボン酸Bの質量、550℃での残質量を銅ナノ粒子Aの質量として、カルボン酸Bの含有量を以下の式で算出した。
カルボン酸Bの含有量[質量%]=100×(35℃から550℃までの質量減少量)/(35℃から550℃までの質量減少量+550℃での残質量)
試料を、カルボン酸Bを含む銅マイクロ粒子aの乾燥粉に変えた以外は[カルボン酸Bを含む銅ナノ粒子Aの乾燥粉中のカルボン酸Bの含有量の算出]と同じ方法で算出した。
合成例1(銅ナノ粒子A1の製造)
2Lビーカーに、銅原料化合物として酸化銅(日進ケムコ株式会社製、N-120)を50.0g、ヘキサン酸(富士フイルム和光純薬株式会社、特級試薬)を4.40g、エタノール(95)(富士フイルム和光純薬株式会社、特級試薬)を500g投入し、15分間撹拌した。撹拌中はオイルバスで反応液の温度を70℃に制御した。
次いで、50mLの滴下ロートに入れたヒドラジン一水和物(富士フイルム和光純薬株式会社製、特級試薬)63.0gを、25℃にて、20分かけて前記混合液に滴下した。その後、オイルバスで反応液の温度を70℃に制御しながら1時間撹拌し、次いで空冷して、銅ナノ粒子を含有する赤褐色の分散液を得た。
得られた分散液全量を、日立工機株式会社製の冷却遠心分離機「himacCR22G」及びロータ(R12A、半径15.1cm)を用い、同社製遠心沈降管500PAボトルに入れて、2000回転/分で遠心加速度675Gをかけ、この状態で30分間保持した。遠心分離して分取した沈殿物にアセトン(富士フイルム和光純薬株式会社、一級試薬)を300g加え、15分間撹拌し再分散させた。再度、再分散液全量を同条件で遠心分離し、沈殿物を分取した。この操作を2回行った。
次いで、沈殿物にメタノール(富士フイルム和光純薬株式会社、特級試薬)を300g加え、15分間撹拌し再分散させた。再度、再分散液全量を同条件で遠心分離し、沈殿物を分取した。この操作を2回行った。
精製した銅ナノ粒子の沈殿物を、ドライチャンバー(東京理化器械株式会社製、型式:DRC-1000)を付属した凍結乾燥機(東京理化器械株式会社製、型式:FDU-2110)を用いて、凍結乾燥することにより、銅ナノ粒子A―1の38.0gを得た。乾燥条件は-25℃で1時間凍結し、-10℃で9時間、5Paにて減圧乾燥し、さらに25℃、5時間5Paで減圧乾燥し、ヘキサン酸を含む銅ナノ粒子A1の乾燥粉を得た。得られた銅ナノ粒子は平均粒径が250nm、ヘキサン酸の含有量は0.9質量%であった。
ヘキサン酸をステアリン酸に変えた以外は合成例1と同様に行い、ステアリン酸を含む銅ナノ粒子A3の乾燥粉を得た。得られた銅ナノ粒子A3の平均粒径は240nm、ステアリン酸の含有量は1.0質量%であった。
合成例3(銅マイクロ粒子a1の製造)
ヘキサン酸の添加量を4.40gから0.50gに変えた以外は合成例1と同様に行いヘキサン酸を含む銅マイクロ粒子a1の乾燥粉を得た。得られた銅マイクロ粒子a1は平均粒径が1.0μm、ヘキサン酸の含有量は0.3質量%であった。
ヘキサン酸をラウリン酸に変えた以外は合成例3と同様に行い、ラウリン酸を含む銅マイクロ粒子a2の乾燥粉を得た。得られた銅マイクロ粒子a2の平均粒径は1.1μm、ラウリン酸の含有量は0.3質量%であった。
合成例5(化合物C1の製造)
常法(特開2008-303207号等)にしたがって、化合物C1(約10質量%含水物)を得た。得られた化合物C1含水物を、ドライチャンバー(東京理化器械株式会社製、型式:DRC-1000)を付属した凍結乾燥機(東京理化器械株式会社製、型式:FDU-2110)を用いて、-25℃で1時間凍結し、-10℃で9時間、5Paにて減圧乾燥し、さらに25℃、5時間5Paで減圧乾燥し、化合物C1を乾燥粉として得た。化合物C1のRはn-オクチル基、nは8である。
合成例5と同様に行い、化合物C2を得た。化合物C2のRはラウリル基、nは10である。
合成例5と同様に行い、化合物C3を得た。化合物C3のRはラウリル基、nは6である。
合成例5と同様に行い、化合物C4を得た。化合物C4のRはオレイル基、nは9である。
(銅微粒子分散体の調製)
ジプロピレングリコール(富士フイルム和光純薬株式会社製、一級試薬)0.49g、テトラエチレングリコール(富士フイルム和光純薬株式会社製、一級試薬)0.5g、合成例1で得られたヘキサン酸を含む銅ナノ粒子A1の乾燥粉 9.0g、合成例5で得られた化合物C1 0.01gをメノウ乳鉢に加え、乾燥粉が目視で見えなくなるまで混練し、得られた混合液をポリ瓶に移した。密栓をしたポリ瓶を、自転公転型攪拌装置(株式会社シンキー製、Planetary Vacuum Mixer ARV-310)を用いて、2000min-1(2000回転/分)で5分間攪拌し、銅微粒子分散体1を得た。
得られた銅微粒子分散体1を用いて、以下の方法に従って接合体を製造した。
まず、30mm×30mmの銅板(総厚:1mm)上に、6mm×6mm正方形の開口を3列有するステンレス製のメタルマスク(厚さ:150μm)を載せ、メタルスキージを用いたステンシル印刷により銅微粒子分散体を銅板上に塗布した。その後、大気下シャマルホットプレート(アズワン株式会社製、HHP-441)上で120℃にて10分乾燥させた。その後、5mm×5mmのシリコンチップ(厚さ:400μm)に対して、チタン、ニッケル、金がこの順番でスパッタ処理されたシリコンチップを用意し、塗布した銅微粒子分散体上に、金が銅微粒子分散体と接するように該シリコンチップを載せた。これにより銅板、銅微粒子分散体及びシリコンチップがこの順で積層されてなる積層体を得た。
得られた積層体を以下の方法で焼成し、接合体を得た。まず、積層体を加圧焼成機(明昌機工株式会社製、HTM-1000)にセットし、炉内に窒素を500mL/分で流して炉内の空気を窒素に置換した。その後、上下の加熱ヘッドにより積層体を20MPaで加圧しながら10分間かけて加熱ヘッドの温度を200℃まで昇温した。昇温後、200℃で150秒保持して焼結処理し接合体を得た。焼結後、加熱ヘッドを-60℃/minで水冷し、100℃以下で接合体を空気中に取り出した。
銅微粒子分散体の配合組成を表1に示す組成に変更した以外は実施例1と同様に行い、実施例2~18及び比較例1~8の銅微粒子分散体及び接合体をそれぞれ得た。
ラウリン酸を含む銅ナノ粒子A2の乾燥粉(三井金属鉱業株式会社製、CH200L1、平均粒径190nm、ラウリン酸含有量1.3質量%)
ヘキサン酸(富士フイルム和光純薬株式会社製、特級試薬)
ラウリン酸(富士フイルム和光純薬株式会社製、一級試薬)
ステアリン酸(富士フイルム和光純薬株式会社製、特級試薬)
ジプロピレングリコール(DPG、富士フイルム和光純薬株式会社製、一級試薬)
テトラエチレングリコール(TEG、富士フイルム和光純薬株式会社製、一級試薬)
PEG200(富士フイルム和光純薬株式会社製、一級試薬、ポリアルキレングリコール200)
PEG400(富士フイルム和光純薬株式会社製、一級試薬、ポリアルキレングリコール400)
α―テルピネオール(富士フイルム和光純薬株式会社製、特級試薬)
ジエチレングリコールモノブチルエーテル(富士フイルム和光純薬株式会社製、特級試薬)
[接合体の接合強度]
以下の手順に従って、接合体の接合強度を測定した。
万能型ボンドテスター(ノードソン・アドバンスト・テクノロジー株式会社製、Prospector)を用い、試験速度5mm/分、シェア高さ50μmで接合体のシリコンチップを水平方向に押し、接合体のダイシェア強度を測定した。接合体のそれぞれ3個について行い、3個の接合体を測定して得た値の平均値を接合体の接合強度とした。結果を表2に示す。
銅微粒子分散体を25℃、湿度50%の条件下で一か月保存し、その後、前述の方法と同様の方法により接合体の接合強度を測定した。結果を表2に示す。
Claims (18)
- 銅ナノ粒子A、炭素数6以上14以下のカルボン酸B、下記式(1)で示される化合物C及び分散媒Dを含有し、
前記分散媒Dが(ポリ)アルキレングリコール、(ポリ)アルキレングリコール誘導体、テルペンアルコール、グリセリン及びグリセリン誘導体からなる群から選ばれる少なくとも1種を含み、
前記カルボン酸Bの含有量が0.1質量%以上であり、
前記化合物Cの含有量が0.05質量%以上であり、
前記カルボン酸Bと前記化合物Cの合計含有量が8質量%以下である、銅微粒子分散体。
RO-(CH2CH2O)n-CH2-COOH (1)
〔式(1)中、Rは炭素数6以上14以下の炭化水素基であり、nはエチレンオキシ基の平均付加モル数であり、0.5以上20以下の数である。〕 - 前記銅ナノ粒子Aの含有量が25質量%超97質量%未満である、請求項1に記載の銅微粒子分散体。
- 前記カルボン酸Bの含有量が7.5質量%以下である、請求項1又は2に記載の銅微粒子分散体。
- 前記化合物Cの含有量が7.5質量%以下である、請求項1~3のいずれかに記載の銅微粒子分散体。
- 前記カルボン酸Bと前記化合物Cの合計含有量が0.85質量%以上である、請求項1~4のいずれかに記載の銅微粒子分散体。
- 前記化合物Cが、前記式(1)においてRが炭素数6以上14以下の直鎖飽和アルキル基であり、nが4以上12以下である化合物を含む、請求項1~5のいずれかに記載の銅微粒子分散体。
- 前記カルボン酸Bの含有量に対する前記化合物Cの含有量の質量比が0.05以上9以下である、請求項1~6のいずれかに記載の銅微粒子分散体。
- 前記分散媒Dの含有量が3質量%以上10質量%未満である、請求項1~7のいずれかに記載の銅微粒子分散体。
- 前記分散媒Dの沸点が180℃以上であり、かつ、前記分散媒Dの分子量が600以下である、請求項1~8のいずれかに記載の銅微粒子分散体。
- 銅マイクロ粒子を更に含有する、請求項1~9のいずれかに記載の銅微粒子分散体。
- 前記銅マイクロ粒子の含有量が5質量%以上65質量%以下である、請求項10に記載の銅微粒子分散体。
- 前記銅マイクロ粒子の平均粒径が0.35μm超10μm以下である、請求項10又は11に記載の銅微粒子分散体。
- 複数の金属部材の接合に用いる、請求項1~12のいずれかに記載の銅微粒子分散体。
- 請求項1~13のいずれかに記載の銅微粒子分散体を複数の金属部材の間に介在させて加熱する工程を含む、接合体の製造方法。
- 前記加熱する工程における加熱処理の温度が230℃以下である、請求項14に記載の接合体の製造方法。
- 前記加熱する工程における雰囲気が不活性ガス雰囲気である、請求項14又は15に記載の接合体の製造方法。
- 前記金属部材が金基板、金メッキ基板、銀基板、銀メッキ金属基板、銅基板、パラジウム基板、パラジウムメッキ金属基板、プラチナ基板、プラチナメッキ金属基板、アルミニウム基板、ニッケル基板、ニッケルメッキ金属基板、スズ基板、スズメッキ金属基板、及び電気絶縁性基板の金属部分からなる群から選ばれる少なくとも1種を含む、請求項14~16のいずれかに記載の接合体の製造方法。
- 前記金属部材の接合がチップ部品と回路基板との接合、半導体チップとリードフレーム又は回路基板との接合、及び高発熱の半導体チップと冷却板との接合からなる群から選ばれるいずれかである、請求項14~17のいずれかに記載の接合体の製造方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/038814 WO2023067740A1 (ja) | 2021-10-20 | 2021-10-20 | 銅微粒子分散体 |
CN202180103412.6A CN118215549A (zh) | 2021-10-20 | 2021-10-20 | 铜微粒子分散体 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/038814 WO2023067740A1 (ja) | 2021-10-20 | 2021-10-20 | 銅微粒子分散体 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023067740A1 true WO2023067740A1 (ja) | 2023-04-27 |
Family
ID=86058063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/038814 WO2023067740A1 (ja) | 2021-10-20 | 2021-10-20 | 銅微粒子分散体 |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN118215549A (ja) |
WO (1) | WO2023067740A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008303207A (ja) | 2007-05-07 | 2008-12-18 | Kao Corp | エーテルカルボキシレートの製造方法 |
JP2011068988A (ja) * | 2009-08-28 | 2011-04-07 | Dowa Electronics Materials Co Ltd | 金属ナノ粒子とその凝集体、金属ナノ粒子分散体、それを用いて形成された部材 |
JP2012006005A (ja) * | 2010-05-26 | 2012-01-12 | Dai Ichi Kogyo Seiyaku Co Ltd | 分散剤および分散体組成物 |
JP2014167145A (ja) * | 2013-02-28 | 2014-09-11 | Osaka Univ | 接合材 |
JP2017172003A (ja) | 2016-03-24 | 2017-09-28 | カシオ計算機株式会社 | 銅ナノ粒子の製造方法 |
JP2020053404A (ja) | 2019-12-11 | 2020-04-02 | 三井金属鉱業株式会社 | 銅ペースト及び銅の焼結体の製造方法 |
-
2021
- 2021-10-20 CN CN202180103412.6A patent/CN118215549A/zh active Pending
- 2021-10-20 WO PCT/JP2021/038814 patent/WO2023067740A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008303207A (ja) | 2007-05-07 | 2008-12-18 | Kao Corp | エーテルカルボキシレートの製造方法 |
JP2011068988A (ja) * | 2009-08-28 | 2011-04-07 | Dowa Electronics Materials Co Ltd | 金属ナノ粒子とその凝集体、金属ナノ粒子分散体、それを用いて形成された部材 |
JP2012006005A (ja) * | 2010-05-26 | 2012-01-12 | Dai Ichi Kogyo Seiyaku Co Ltd | 分散剤および分散体組成物 |
JP2014167145A (ja) * | 2013-02-28 | 2014-09-11 | Osaka Univ | 接合材 |
JP2017172003A (ja) | 2016-03-24 | 2017-09-28 | カシオ計算機株式会社 | 銅ナノ粒子の製造方法 |
JP2020053404A (ja) | 2019-12-11 | 2020-04-02 | 三井金属鉱業株式会社 | 銅ペースト及び銅の焼結体の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
CN118215549A (zh) | 2024-06-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6423416B2 (ja) | 焼結が難しい貴金属表面および非貴金属表面上に酸化銀が被覆された焼結ペースト | |
JP6016664B2 (ja) | 銅微粒子分散溶液、焼結導電体の製造方法、及び導電接続部材の製造方法 | |
JP6032110B2 (ja) | 金属ナノ粒子材料、それを含有する接合材料、およびそれを用いた半導体装置 | |
JP6153076B2 (ja) | 金属ナノ粒子ペースト、それを含有する接合材料、及びそれを用いた半導体装置 | |
JP6923063B2 (ja) | 銀ペースト及びその製造方法並びに接合体の製造方法 | |
WO2021125161A1 (ja) | 銀ペースト及びその製造方法並びに接合体の製造方法 | |
JP6270241B2 (ja) | 接合材料及びそれを用いた半導体装置 | |
TWI835866B (zh) | 導電性膏 | |
JP7434786B2 (ja) | 銅/酸化銅微粒子ペースト | |
JP2012218020A (ja) | 接合方法 | |
JP6404261B2 (ja) | 銀粉 | |
WO2023067740A1 (ja) | 銅微粒子分散体 | |
JP6605848B2 (ja) | 表面被覆金属微粒子の分散溶液、ならびにこの分散溶液の塗布および焼結する工程を含む、焼結導電体および導電接続部材の製造方法 | |
JP6947280B2 (ja) | 銀ペースト及びその製造方法並びに接合体の製造方法 | |
KR20240087835A (ko) | 구리 미립자 분산체 | |
JP2008235035A (ja) | 金属ナノ粒子ペースト及び当該金属ナノ粒子ペーストの製造方法 | |
WO2023013034A1 (ja) | 銅微粒子分散体 | |
US11801556B2 (en) | Metal particle aggregates, method for producing same, paste-like metal particle aggregate composition, and method for producing bonded body using said paste-like metal particle aggregate composition | |
JP6823856B1 (ja) | 接合体の製造方法 | |
WO2021125336A1 (ja) | 銀ペースト及びその製造方法並びに接合体の製造方法 | |
JP6944734B2 (ja) | 接合体および電子装置 | |
WO2024111095A1 (ja) | 接合用組成物、及び接合体の製造方法 | |
JP2015003970A (ja) | 導体パターン形成用インク | |
KR20240067835A (ko) | 은분의 제조 방법 | |
JP2020198216A (ja) | 金属ペースト、焼結体、配線、物品、焼結体の製造方法及び物品の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21961392 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2023554161 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021961392 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021961392 Country of ref document: EP Effective date: 20240521 |